RDFa

W3C, Cambridge, Massachusetts, United States

RDFa (Resource Description Framework in Attributes) is an extension to HTML5 that embeds structured metadata within page content by adding attributes based on the RDF data model.

It uses HTML attributes such as vocab, typeof, and property to describe entities like people, places, events, recipes, and reviews, supports multiple vocabularies such as Schema.org, Dublin Core, and GoodRelations, and is one of the structured data formats supported by Google alongside JSON-LD and Microdata.

According to our data, RDFa is the 10th most popular semantic markup technology on the web.
It has 1% of the semantic markup market share and is detected on 0.7% of all websites.

Statistics based on 3.5M+ analyzed websites. About this data

📊 Rankings and Market Share

🏆 RDFa Awards

⚡ Sites Using RDFa

We have data on 26,000 websites that use RDFa semantic markup technology. Here is a list of some of the top ranked ones.

The highest rated site using RDFa is instructure.com.

#WebsiteRankCountryLanguage
1 instructure.com #52 United States English
2 en.wikipedia.org United States English
3 irs.gov #183 United States English
4 canada.ca #209 Canada English
5 mit.edu #215 United States English
6 apps.apple.com United States American English
7 itunes.apple.com United States American English
8 support.apple.com United States American English
9 es.wikipedia.org United States Spanish
10 umn.edu #1,264 United States English
11 ox.ac.uk #1,299 United Kingdom English
12 wikisource.org #1,317 United States English
13 punjab.gov.pk #1,417 Pakistan English
14 nasdaq.com #1,452 United States English
15 developer.mozilla.org American English
16 incometax.gov.in #1,586 India English
17 commons.wikimedia.org United States English
18 tagesspiegel.de #1,700 Germany German
19 gba.gob.ar #1,833 Argentina Spanish
20 uwaterloo.ca #1,920 Canada English

📈 Usage Statistics

Most of the sites that use RDFa:

Most of the sites using RDFa are from the United States, Germany, and France.

  • United States 16.4%
  • Germany 8.2%
  • France 6.9%
  • United Kingdom 5.1%
  • Spain 4.3%
  • Italy 3.8%
  • Russia 3.5%
  • Canada 3.4%
  • Belgium 3.2%
  • Other 45.2%

Most RDFa users speak English, German, or French.

  • English 46.5%
  • German 7.8%
  • French 7.4%
  • Spanish 5.2%
  • Russian 4.5%
  • Dutch 3.5%
  • Italian 3%
  • Japanese 2%
  • Greek 1.9%
  • Other 18.2%

RDFa semantic markup technology is especially popular on .com, .org, and .de top-level domains.

  • .com 29%
  • .org 10.9%
  • .de 5%
  • .fr 3.1%
  • .ru 2.5%
  • .it 2.4%
  • .net 2.2%
  • .be 2.1%
  • .ca 2%
  • Other 40.8%

The primary market segments for websites utilizing RDFa include business, education and reference, and marketing and merchandising.

  • Business 18.5%
  • Education/Reference 12.4%
  • Marketing/Merchandising 8.6%
  • Online Shopping 5.4%
  • Health 5.2%
  • Non-Profit/Advocacy/NGO 5.1%
  • Government/Military 4.6%
  • Travel 3.7%
  • Blogs/Wiki 3.6%
  • Other 32.9%

🕵️ Similar Technologies

These are some of the best RDFa alternatives.

RankName
2
Open Graph
Menlo Park, California, United States

A web metadata standard that defines how webpages are described as structured objects for use in social graphs and enables their consistent representation.
3
Twitter Cards
Bastrop, Texas, United States

A metadata format used by X, originally Twitter, that enables links in posts to display rich previews with images, videos, and interactive media to increase engagement and traffic.
4
JSON-LD
Cambridge, Massachusetts, United States

A lightweight linked data format used to embed structured data into web pages in a machine-readable form.
7
Microdata
Cambridge, Massachusetts, United States

An HTML specification used to embed structured metadata within web page content by annotating elements with machine-readable attributes.
13
GoodRelations
Neubiberg, Germany

A standardized vocabulary for product, price, store, and company data that can be embedded into web pages and processed by search engines and other data-consuming services.

🆚 Compare Alternatives

Compare RDFa to…

💬 Frequently Asked Questions

What is the company behind RDFa?

RDFa is owned by World Wide Web Consortium, Inc., headquartered in Cambridge, Massachusetts, United States.

Which country uses RDFa the most?

The majority of RDFa users are from the United States.

Who uses RDFa?

According to our data, RDFa is used on thousands of sites, including instructure.com, en.wikipedia.org, and irs.gov.

Is RDFa used on government websites?

Yes, for example, it is used by irs.gov, punjab.gov.pk, and incometax.gov.in. Overall, we found RDFa on 191 government sites in the United States.

Do academic institutions use RDFa?

Yes, quite a few! The most prominent of these are mit.edu, umn.edu, and ox.ac.uk. In total, we know of 255 academic websites in the United States that use RDFa.

How does RDFa compare to its competitors?

RDFa is a moderately popular semantic markup technology, ranking ahead of 4 other semantic markup technologies we track.

What are the alternatives to RDFa?

Alternatives and possible competitors to RDFa may include JSON-LD, Microdata, and GoodRelations.

👉 See Also

🗃️ About This Data